The rep says Ray J was in Las Vegas to host a party and also attended Sunday's Billboard Music Awards. The rep adds that Ray J had just returned from performing in China. "He had just returned to the US from a quick 32-hour round trip from China where he performed a concert and had meetings regarding a new business. Upon landing, he immediately drove four hours to Las Vegas for the two events," the rep said in a statement.

Ray J is R&B singer Brandy's younger brother. He was close friends with Whitney Houston and said in March that he was "still hurting" a month after she drowned in a bathtub in California at age 48.